import java.io.*;
import java.util.*;
import java.util.regex.*;
import java.lang.Math.*;

public class Main{
	public static void main(String[] args){
		Scanner in = new Scanner(System.in);
		String str = in.nextLine();
		Matcher matcher = Pattern.compile("…+").matcher(str);
		int ans = 0;
		while(matcher.find()){
			ans = Math.max(ans, matcher.group().length());
		}
		System.out.println(ans);
	}
}